LMG3522R030: LMG3522R030/LMG3422R030 Drain current vs RθJC

Tool/software:

Hello,

according to the datasheets, LMG3522R030 and LMG3422R030 have the following values:

LMG3522R030 (Top-side cooled):
ID(RMS) 38A
Tj max 150°C
RθJC(top) 0.28 K/W

LMG3422R030 (Bottom-side cooled):
ID(RMS) 40A
Tj max 150°C
RθJC(bot) 0.55 K/W

How is it possible for the LMG3422R030 to drive more current with a higher thermal resistance?
Shouldn't it be the other way around?

Kind regards
Kevin Vogel