The experience on an emulator is not always 100% accurate. Sometimes the small lag added can change the gameplay feeling considerably and there might be tiny differences in the sound and the colors. I would suggest you to look for an FPGA replica. An N-go board or a ZXUno is a very reliable replica of the original hw for a decent price. If you have more money to spend then try to purchase a used ZX Next. If you do not care about such finesses then go for emulation though.
