The original X250 had feedback & good bass control.
The original X350 had zero feedback & less bass control than the X250 (to me).
If the .5 amps are the same, I'd opt for the X250.5.
The original X350 had zero feedback & less bass control than the X250 (to me).
If the .5 amps are the same, I'd opt for the X250.5.