Can't get the same samples using speed change

[PGA]

Sound is analog not digital. The computer converts analog to digital (when you record it) and digital to analog (when you play it back). Our ears are analog devices, so the only true test is: does it sound OK? Whether the bits are the same or not is, largely, irrelevant.

[steve]

I'm not sure I can hear a difference but I have noticed the difference by comparing with the EAC programme in "WAV Compare" and it says the samples are different...

That could be as little as 1 bit different anywhere in the file and is not necessarily significant. If it sounds right I'd not worry. The cause of the difference could be just about anything. Perhaps you didn't switch off dither last time, or perhaps you missed selecting the final sample, or perhaps Audacity missed off the final sample (it did that occasionally in some old beta versions), or perhaps.... something else.

[bomber1978]

OK thanks I was thinking they should have all been the same....
Just as a note - EAC : Wav Compare is pretty good at giving these differences, it will tell you any spots where there are different samples to .000 of a sec, and it says the whole files are different...., I know you could not hear a few samples, but it's very good at showing even if there's a small pop or something off the disc and it will show....
About default settings etc. being different from the old andvnew Audacity, is there likely to be an actual audible difference to the file I changed with the older Audacity?
Thanks

[steve]

is there likely to be an actual audible difference to the file I changed with the older Audacity?

I wouldn't expect so.