Kacerdias;
Please do check the Leupold site, but I believe that you'll find that the FX has it's parallax set to 50 or 60 yards. The VX will have it's parallax set at something like 150 yards, ie for centerfire situations.
If you believe that you'll be using your .22 over a wide spread of distances, you might wish to consider getting a good scope that has an adustable objective. The A/O function will allow you to adjust the parallax correction of the scope to the range you're shooting at.
I do a lot of rimfire hunting, frequently at extended range, & find the A/O to be very useful to me. There are a number of scopes other than the Leupold's that might serve you well, and offer A/O.
I see that Natchez is offering a Simmons 4.5-14 A/O for something around $125.00. In a rimfire application, the Simmons can be an outstanding value. I've got an older Whitetail Classic 4-12 A/O on a gun that's been excellent for about 8 years now. The Bushnell Legend 5-15X A/O runs arout $175.00 these days, and has a mil-dot reticle also. Nikon makes some very fine A/O scopes that truly are superior glass, but in the Monarchs, cost about twice as much as the Bushnell.
I'd try to find a good shop that'll not only have a variety of brands, but also help you test them & find what works for you in your budget range.
900F