Picture 5 is NOT a shot of the CSPPC in an Amiga 4000T.
That's a Zorro Bus-board shoved into an A4KD mobo with a CSPPC card sat atop it. The ad appears to not say about this.
The only way to have a fair comparison would be to have identical Amiga guts & the ONLY difference being the case.
If you're allowing for genuinality, then the C= A4KT should pi$$ all over the Escom affair!! Then again, the Escom should have newer parts & might have had an easier life & should last longer! Just another form of Lottery I guess! :-D