27 mhz vrs. 49 mhz or is it Regular vrs SE

[Sleeping911]

I have picked up a few zz and zz se's in the last couple of weeks and have noticed that the 27 mhz cars dont seem to have the same range as the 49 mhz cars.I noticed this on both my 27 mhz reg. and 27 mhz SE(10 - 15ft), my 49 mhz reg. works incredibly(20 -30 ft.), and i dont have a 49 mhz SE. So my questions are...(1)Do the 27 mhz work not as well as the 49 mhz and also are the reg. better than the SE's for range (i noticed the SE antennae is thinner). (2) will all of that change once i have done FET mod. (3) any suggestions for incresing or comments on your current ranges using?? or a "fixed" antennae solution.