Yes is the same. I'm brazilian and my family is portuguese and stills the same. Otherwise you wouldn't be able to speak with british or australians without doing a language course. The main difference is only the accent and a few words that exist almost in both language, but are not used in a daily basis.
And, about the accent, in the USA you do (sorry if you're not american) have different accent within the same country, just as UK, Portugal or Brazil. Apple just implement a different accent management, but the main functions of Siri remains locked to USA
only
So, Apple announces a LTE device which, alongside Retina Display, is the main feature of iPad, but it doesn't work but they still advertise as if it was possible to use outside USA. It's not about having or not LTE, it's about advertise it. We (europeans) may not have the largest LTE network, but we do have! So why can't we use it? It's really quite simple to do 2 versions...
And I don't know about Nexus...
----------
Just look to the answer I gave to KPMO
Well, I speak, if I speak English, the Queens English. If the iPhone 4S is set to lacation Spain, Siri to English (American) about 50% or more of querries go missing. When I switch to English (UK) 95% of responses are correct.
Apple even brought out an update to improve English (Australian) because in the beginning there where too many problems.
What the LTE is concerned, so was it very clear to me, from the beginning, that the LTE networks of North America will be supported, nobody else. My first and main clue was, that they even named the supported networks, with trademark. Granted, I work in the industry so I knew that there could not be any European, UK, Asien, Eurasien, Scandinavien, Korean, south Chineese, island Chineese or Bejing Chineese or indeed Hong Kong Chineese LTE support (all are incompatible to each other at this time).
I saw the main selling point in the remarkable Display and the noticable and massive speed increase of the build in modem. And that got nothing to do with LTE (except in the States) but the fakt, that the "3G" networks outside the States extreem faster perform then anything on the market today.
I for one are quite happy that European LTE is not supported yet, I rather enjoy faster speeds, better coverage and less battey drain and in a year, or better two, when LTE eventually takes off and promises decent speeds and the chips are available that can cope with the battery, then, yes, maybe I am interrested.
Of course, the question remains, for what we use these speeds on a portable, memory limited device. If I stream video or surf the net, I do not have any difference on the iPad at 7, 14, 21 or 38 Mbit/s. I can only see the difference on speedtest.net, but in practice there is no difference at all (except in the States, thats why they got LTE)
I thing with LTE (I tested the in Germany available Phone and there USB Sticks) and the atm available 20Mbit/s (if that) Movies will still be the same speed to watch, it would be stupid to speed up real time events.
Downloads are not an issue on a pad or phone, as your memory would be full within minutes, so thats only interesting on notebooks/computers.
There still seems to be the prevailing thought that LTE is faster then "3G", it is not. At least not right now. It IS faster in the States and, to an extent, in Sweden in some selected aereas or stationary (not the user case of an iPad) but other then that, we are right now better off with the existing networks.