1 2 3 nlgi grade grease , better for bearings than bike shop grease ???

What is "Bike Shop Grease"? Somehow different than "Auto Shop Grease" or "Motorcycle Shop Grease"?
NLGI rating is a consistency or viscosity type index, not a betterness index.

https://www.thelubricantstore.com/la...to-nlgi-grades

Selecting grease

NLGI is not as important as the general properties. #2 grease class is fine and excellent in most cases(hence it is most common). #1 should be used sparingly like in freewheels or shifter mechanisms if so led. #3 is hard to find and expensive but has very high adhesion and abuse tolerances. I found that out years ago when I needed high abuse tolerant grease for a farm field cutter that spun a sickle mower plain-bearing at 600 RPM. #2 grease was reapplied religiously on the hour, where #3 was once per day. In a bike if you used #3 for your hubs you would feel very dragged compared to #2 or #1 . Conversely if you used #1 in a hub your wear or service intervals would be very short but your drag would also be low.
My best general experience with a #2 grease is Valvoline 614. It is far cheaper than Park or the other competitive cycling greases and tolerates automotive disc brake temperatures well. In my daily commuter and trail race mtb(same bike often) it enjoys an annual grease inspection, Rarely a grease replenishment.

Pick up a small tub of NLGI #2 grease from your local auto parts store for $10, it'll last decades. I use Mobil 1 synthetic, but Valvoline is good too.