[meta-freescale] Kernel 3.0.35 (fsl vs imx)

[Marco]

Hello,
if I use only the layer meta-fsl-arm I get by default the kernel 
linux-fsl-3.0.35-r32-14
if I add the layers meta-fsl-arm-extra and meta-fsl-demo I get the 
kernel linux-imx-3.0.35-r37-14

What is the suggested version to use?

TIA
-- 
Marco