Both are equally good as of now. But for pure gaming purpose, I would be more inclined towards the i5 over r5 due to its faster clocks and IPC. The i5 still holds the gaming benches.
the r5 1400 is usually significantly cheaper than the 7500
due to it's limitation I wouldn't suggest the 1400
if it was the 1500X or 1600, it'd get my vote immediately.
Ryzen 1500x or 1600 both beat i5 7500 in most cases and can keep up with i7 in some cases even. Plus is cheaper than both. Id squeeze the funds in for a 1500x