It's similar but with the 10MB, that's all you get, 10MB. This new one gives unlimited email access with attachments included, they could easily be a lot more than 10MB. I originally had that and frequently went over but by paying a fiver, for the 1GB X-Series Sliver thing, I have never come close ,except for the times I've used it as a modem (which they don't like). I use it a lot every day for all sorts of things, reading ElReg, watching YouTube, banking, eBay, PrOn and use about half my allowance.
This service is for people who ONLY want to email and rather than pay a fiver for 1GB that they won't use, they pay half that so that they can email as much as they like. Personally I can't stand the MobileMail malarky and prefer checking my GMail account every couple of hours or so. MobileMail seems like it'd be ok for people who haven't heard of Opera Mini but if you use it why bother with Mobile Mail?
Paris, cos I'd pay £2.50 for unlimited access.