CRC offer a lower intro price due to the cost savings of some plastic parts, and an open pod design
They have all the upgrade parts, and if you need them ? the cost will be more or less the same as an R5.1

Stormer prices are as follows

Price:
$169.95
Carpet Knife Generation XL 1/12th On-Road Car Kit


Price:
$229.99
12R5.1 Factory Team 1/12 On-road Car Kit


Price:
$249.95
Copperhead Lipo Edition 1/12th Pan Car kit