I'd say all three are very effective. However all 3 have some aspects the same and some operational aspects of use that are unique to each.
I've riden in ford and dodge's and own a GM. Are they different? yes, I notice some differences in how the engage, etc. However I'd say effectiveness is pretty comparable. And you'll love it.
2011 Keystone Outback 295RE
2004 14' bikehauler with full living quarters
2015.5 Denali 4x4 CC/SB Duramax/Allison
2004.5 Silverado 4x4 CC/SB Duramax/Allison passed on to our Son!