In reply to Garethza:
Hubbas are lighter and cheaper, but not as sturdy in the weather. I would say the Hubba is a UK summer and bridge season model, but not really ideal for the wintry end of spring or autumn. The Access is almost opposite, really quite winter-worthy for a lightish backpackable tent but not so well suited to full summer.
Poles: It's decent but unremarkable alu (Hubba) vs snazzy Syclone (Access). The pole design is also different: With the Access the cross-pole reaches the ground to give you a lot more lateral stability, whereas in the Hubba it's just a short overhead section to increase space at head height.
Inner: Hubbas are very meshy, which is great in summer but I can attest to it being draughty and cold in less-than-nice weather. Very little mesh in the Access. Without pitching them side by side (I've got both here) I'd say the fly comes lower on the Access too, which would be better for keeping wind out but less venty if it's hot.
Sure there are other differences but I think they may be the main ones.