Bullshit. It's much better than a backlit Original Game Boy, in my opinion. It's able to handle more processes - in LSDJ, complex tables and high BMPs are handled quite easily with them. My only issue is practicality in live setups. I like being able to fade out tracks on the unit itself. This can be difficult on the SP. And needing the extra headphone adapter is a bastard sometimes.
I'd highly recommend trying it, I prefer the wave and noise channel on SPs.