I have used spotting scopes of various brands for a great many years. Bench shooting and when shooting long distances from 200 to 600 yards.
Spotting scopes are for great if you are shooting from a bench. OR, for others to observe while standing away from the shooting area.
Binos are iffy when trying to observe from longer distances. But are great for field use especially to observe game.
I believe my first was a Bushnell Sentry. Worked great from the bench at 100 yards. BUT, eye relief was poor. It seemed like a struggle.
But, it was clear. And needed more magnification.
This is just to make a point.
After you've tried a few from inexpensive to higher end you will begin to understand the real difference. If you can, see what others are using and ask it you can take a look. You do need a good quality spotting scope. Yes, they can be expensive. But, so are the rifles we shoot.
I've been using a Kowa since the 1990's. Before that several that were average but could not get close to the quality of the Kowa.
I would definitely go for the scope body that offers an angled eyepiece - usually 45'. Try and get an eyepiece that offers long eye relief - it really helps.
I base this from experience shooting longer distances and while shooting from different positions. Others may find straight body scopes more suitable.
BUT, you can't get past the need for quality optics, clarity, definition, and long eye relief.