You might want to look just a few posts down to find a very similar thread.
Mesmer was my first toon that I took to 80. Shortly thereafter I switched to Ele and it is my new main.
Mobility – Eles and Mesmers are both very mobile while in combat. Out of combat, however, they are like night and day. Eles zip around all over the place, while Mesmers feel like turtles to me.
Solo play – Both are excellent solo professions. Very kitey, dropping damage on your opponent as you skip around the battle-field.
PvE Zerg Play – When it comes to Dragons and other world bosses or DEs in Orr, things die very quickly. Mesmers have a ramp-up time getting clones out which makes them very frustrating when things are getting mowed down incredibly fast. Eles can lay down AoE and shovel in the loot.
WvW – Mesmers have some awsome utility for WvW like a pull that can bring the opponent down off of walls, reflects that punish enemies who aren’t paying attention, and the much-hated portal. Eles, on the other hand, have AoE damage to contribute both at range and in close combat (staff vs. dagger) as well as support and CC. They’re both fun in WvW.
Can’t speak to sPvP.
