Interestingly my newest dell reflects a nastier design of the power plug. (longer arm means more torque at the board)
My older (i8200) has a relatively short "lever-arm" (~1.4") vs the newer (M60) sticking out at a ful 2".
Planned obsolescence? .. .Dunno; the newer one has a three year warranty, standard.
The earlier sure looks like the better design, IMO.
I'll have to check the PCBA mounting point to know for sure.