Both equally regarding undercarriage washing. IMO it's up to you how you like the final wash. Like I'd advise getting a single wash at both places then just taking a look at the results. Then compare that to other stuff like location convenience.

Like I appreciate all the great free vacuums at Clean&Green. Also as an aside, not everyone cares...but clean&green uses less than 15gal/car wash and uses earth friendly chemicals and solutions.

I am super particular about my car and kinda OCD about keeping it clean. So I got you.

My favorite is probably the Clean & Green on rt20.

Bonus for this location, it's near the almost-ready-to-open Market Basket. MB is a NE specific grocery chain known for their great product and deals (there is a serious amount of customer loyalty too with the store). We're all excited for it to open. Clean&Green is also super close to my oft go-to grocery store, Wegman's. If you haven't been yet, I describe it as bougie-but-with-deals. Like if Wholefoods wasn't "whole paycheck". Extensive and very good quality produce. Excellent seafood and meat department. They have "Wegmans brands" which is a bit like Costco Kirkland branding. Has a liquor store extension with a huge variety of craft beer and ciders (both which we're known for in NE). It's, uhhh, also really close to a couple cannabis retailers like The Botanist.

I've lived on the west coast, midwest, and east...and by far MA is my favorite. Which is why I've lived here the longest and consider myself a fully adopted masshole. All of the NE mannerisms will seem grumpy or curt to you at first (like no one's going to be smiling at you or saying hello)...but it's because we don't deal with fake friendliness. We figure you are doing shit out and about and we're not going to get in your way because we have shit to do too. But new englanders are super genuine. If someone is friendly you can trust they're being real about it...and not doing it to blow wind up your skirt. Like if someone says they'll help you clear some snow off your driveway with their snowblower, they'll absolutely show up. If after a nor'easter storm, a tree falls down in your yard, someone will come over with a chainsaw asking if you need help clearing the mess. I think the cranky grumbling is part of the charm around here. Especially around Worcester, where cranky is an art form (but it wouldn't be Worcester without it).

Ehh people can be grumpy about that. A NE pro-tip that will save you lots of money down the road on car maintenance: get a monthly subscription to a car wash place. Go whenever there is a dry day and always get the undercarriage wash. Honestly, a monthly pass equals about 3 washes without the pass...so it's a deal to get the pass during winter months. The key is to time it after a snow storm (or a rain that rehydrates the road salt) and as soon as the roads dry out...get a wash. This is so you don't kick up more salt on your drive home in a freshly washed car. Why not a DIY? Go for it if you buy yourself an undercarriage roller that fits onto a hose, but you'd have to deal with mitigating a hose and faucet from getting frozen. The easiest is going to a wash facility.

My three favorite car wash locations (choose whichever washing style you prefer i.e. no touch vs touch):

Clean and Green car wash in Shrewsbury on rt20

Bonus is is a large number of car vacuums (free) that are strong. Clutch for winter grit getting into car carpets.

Ernie's touchless car wash

Scrub-a-dub Shrewsbury location on rt9

I see you're from CA. Welcome to the best coast. No more unlivable droughts or giant wildfire outbreaks! You get seasons now and in 2hrs of driving you can be in 4 different states. Don't be discouraged by the New Englanders who get salty about the winter. People who never lived in a place where water restrictions were the norm and lakes permanently dried up, don't know how good they have it. New England is a good choice to transplant yourself.

Take a drive up north in NH and Vermont this weekend because it'll be at peak color in the mountains. Specifically go toward the white mountains in NH or toward Stow in vermont. Central/South Massachusetts is about 2 weeks behind in peak leaf color. If you just want to drive around locally, I'd advise taking weekend drives on back roads around northern to western mass for the best color. Like around the Nashoba Valley, head toward Nashua, or take route 2 west toward Pittsfield.

I was born in California so I have this innate yearning for the mexican flavor profile of yore I experienced as a kid. Most of the examples in this thread are fine, but they are tex-mex. Taco Cailente will have huitlacoche and nopales on the menu if they're able to get them. They'll also have good soups (hominy or tripe) on weekends. These aren't common ingredients in mexican restaurants outside the southwest/west.

Did you try the birria taco? I've never felt they tasted like they were overly stewed. But I've always hit them in the early afternoon. They have specials like taco pirata and weekend soup options.

Do you like tacos? Then go to Taco Caliente on Chandler. No fuss taco shop but authtucally flavored tacos that aren't texmex.