Best size?

cr 250.........................

So you guys think that an rm 250 or any other 250 stroke dirtbike is better in the dunes than the 250 4 strokes (Crf 250r-ktm 250sxf-rmz 250-kx250f)?
Out of subject question: Are the husqvarna bikes any good?? (reliability wise and performance??)
Please answer both questions...
Thank you
 
idk if there reliable but ive seen some hare scrambles and there are a handfull of guys who run the huskys and do pretty damn good