Today, I am as undecided about the best choice of the two (2) interfaces as I was when I originally posted. Although I'm as inspired as anybody else is about the Pianoteq Video Contest 2019 first place winning entry "The Place where the lost Things go" by Eddie Nuenning. It to me reenforces the proposition any upright electric bass (such as my Stagg EDB-3/4 BK Electric Upright Double Bass) is probably fine via either interface in live accompaniments to an highly nuanced performance. Now since a bass instrument (whether electric or acoustic) can send additionally MIDI messages to a VST such as PIANOTEQ or any other, and through a software plugin —namely MIDI BASS or MIDI GUITAR II— which on-the-fly can convert audio from a guitar or bass into MIDI, it is possible and even advantageous for musicians to record qualitatively on a small budget. Indeed, they may make up musicians considered accomplished or otherwise:
Upon whichever interface I resultantly choose, I'm planning to hook up bass tones from the Stagg EDB-3/4 BK Electric Upright Double Bass (below) and just possibly for non-acoustic instrumentations from a bassist use MIDI BASS from JAM ORIGIN, http://www.jamorigin.com/products/midi-bass/.

Pianoteq 8 Studio Bundle, Pearl malletSTATION EM1, Roland (DRUM SOUND MODULE TD-30, HandSonic 10, AX-1), Akai EWI USB, Yamaha DIGITAL PIANO P-95, M-Audio STUDIOPHILE BX5, Focusrite Saffire PRO 24 DSP.