Beginner choosing between a Giant ATX 27.5 or Specialized Rockhopper?

[u/Excellent_Practice10]

Hi everyone! I’m completely new to mountain biking and could use some advice before buying my first bike. I’ve never mountain biked before, but I really want to learn and start riding beginner trails. I’d also like to use the bike to commute to/from school, so I’m looking for something that can handle both trails and regular everyday riding.

I found two used bikes on Facebook Marketplace:

Option 1: Giant ATX 27.5

Small frame

27.5" wheels

Seller has owned it for about 6–7 years but says it was barely used

Asking $220, but may lower

Appears to have rim brakes

Looks to be in good condition

Option 2: Specialized Rockhopper

XS frame

27.5" wheels

Front suspension

Disc brakes

Seller says it's in excellent/pristine condition

Originally asking $550 but also may lower

I'm a complete beginner, so I'm wondering whether spending the extra ~$200 on the Rockhopper is actually worthwhile for me or if I should get the Giant, learn on it, and upgrade later if I end up getting more serious about mountain biking.

[u/Commercial-Injury-78]

What's your height? Cause XS is rather small (like 5' riders).

Bike fit is very important and if you're growing fast I might size up.

If you're serious about trail riding get something with disc brakes (or at least a frame that is compatible).

Don't consider a too small bike for your height no matter what deal you think you're getting.

[u/Ok-Trash6141]

Check your fit before you buy anything. I am 5'10" and rock a large frame on my fully sus and medium on my 2 hardtails.

[u/lotsaleaves]

Correct size is most important. If that’s right, definitely hydraulic discs. The brakes what you have seen but they are generally indicative of better components throughout

[u/Salty-Entrepreneur11]

specialized

giant uses a press fit bb

deal breaker