would it be a problem in just gaining air experience on another type?
I did this, flying an R22 through solo, and then shifting to an Enstrom 480B (the type I would be flying after completing the PPL) to finish the PPL. While every choice comes with tradeoffs, I found some benefits to this broader learning experience. I wouldnt be too concerned about the added hours unless it is your intent to stop flying immediately upon completion of your PPL. All the hours count toward total experience and one learns something with every hour of experience. On the other hand, if completing the PPL in the minimum number of hours possible is important, stick with one type.