I have a 12 with a vmp tvs charger and other mods pushing 700rwh. My question is I have come across a 13 at a cheap price with 4000 miles. just wondering if its worth selling my 12 for the 13. Will a modded 13 hold any more power than my 12? Do the 13's have any other big differences except for launch control that will make the trade worth my time.