Different speeds for HP-41CX and HP-41CV

[jedu]

Hi

After some time trying to get a HP-41 calculator I had the opportunity to get two: a HP-41CX halfnut and HP-41CV fullnut.

I just checked if they where more or less alike in terms of speed and there is a big difference executing 69!:

See: https://youtu.be/T-tmZWTPivA

I really don't know the reason... I have been checking in Internet and I haven't found any good reason for this to happen...

Any idea?

Best regards

Eduardo