Stylus change

[Stiffy]

I fancy upgrading my cart or just changing the stylus with as little outlay as possible.
I'm currently using a lowly AT 91N which sounds fine but I can't help wondering what I might be missing.
Does anyone know if the Rega Carbon stylus (which I believe fits the AT91 cart) is exactly the same as the AT stylus?
If it is there's no point in trying it.

[Macca]

I think the Carbon has an upgraded cantilever.

Not sure that it would be much of an improvement even so.

[Stiffy]

Ok, thanks for the advice.

[Roy S]

Just changed from an AT91 to an Ortofon Red - a significant improvement.