What I notice about many of the bench grinders on the market today is that the od of the motor housing is as large or larger than the wheels and the shaft length from the motor to the wheel is quite short. Another thing s forget the hp rating and look at the amps. More amps at the same voltage generally equals more power.
Both of those things will limit what you can grind.
If all you wish to do is sharpen drill bits and chisels there are better grinders for that than a bench grinder anyway.
I do not know of the quality of the grinder in the picture, it just happened to show up on a google search. It does show a bench grinder that has larger wheels than the motor housing and the shaft length is adequate imho.
I think the grinder in the first pic is listed at $239 .