two PSU's, same line but different wattage, on same load: will they have same temps?

[corsican]

suppose we got an RM550x & an RM1000x both new

 

now suppose BOTH are pulling 300W (also suppose the PC's they're feeding are 100% identical & running the same apps for test purposes)

 

 

so basically they have the same "absolute" load, but different "relative" load (one pulling at more than half & the other less than half its capacity)

 

> question: will they have the same temp, or will one of them (presumably the lower capacity one?) be hotter?

 

(and if so why?)

 

 

question addressed @ Corsair engineers & other advanced techies