For basic aeros instruction either will do. As others have said, the instructor / school / condition of the aircraft will be more important... and nothing to stop you swapping between the 2 at will.
Once you have grasped the basics of 3 or 4 manoeuvres, and got spinning / visual UPs totally sorted, then you can determine where and how far you want your aerobatics to go e.g. towards an Extra, or back to an Aerobat etc.