Spyder vs1 VS. the spyder Electra?

which one should i buy. i own the tippmann 98 with basicly max ugrades and i would like to up grade it to a better gun. i play bush ball and speed ball all the time and i would like to buy a better gun if you know wat i mean and my decisions have came down to theas two guns..i will be using co2 all the time and rarely hpa by the way what is hpa .."oxygen"?? just give me your thoughts