Eh, I wouldn't go that far from my experience. Bull Moose is, purely as a record store, pretty overrated in terms of a Brick and Mortar. The clearance rarely has the prices to justify it being called clearance, the used prices aren't typically super competitive (some truly insane prices, most are cheaper online in some areas or in other stores), and selection can be pretty limited on all but the biggest artists. With that said, I think their other options (CDs, DVDs, Blu Rays) are worlds better than most other stores in the area, the books usually have some great bargains, decent gaming selection too, as well as the collectible side. The website's functionality is meh but their online services for me have been top notch - cheap free shipping with multiple packages, a large selection of vinyl and non-vinyl to make that threshhold, and I've never had a shopping issue Plus they're willing to try and get imports / hard to find items on some things and are usually quick to tell you if it's legit out of print. Usually quite quick too.
I'd take Bull Moose over Newbury 11 of 10 times. It's pretty much always cheaper for new or used items, more likely to be in good condition, cheaper threshold for free shipping online, curbside pickup, and really just better overall. Newbury's only upsides to me are their very consistent Funko selection and more aggressive clearance options (plus they'll occasionally mess up on used vinyl pricing - it's either all overpriced with a rare underpricing).
I still go to both but if you made me ditch one and keep one, I keep Bull Moose easily over Newbury.