It's all available to stream on BC now so not sure which two you have heard, probably the vocal with Neneh Cherry?
First side is quite in the vein of that tune but no more vocals. Side 2 ups the tempo a bit and is less string laden but they're still there.
Unsurprisingly Allen doesn't blow long and hard on this but he's definitely a major solo voice, especially on side 1 but so too are Michael Ray and Knoel Scott in places. Marshall wrote all but one track so his voice is there compositionally too.
Sleeve notes say they aimed for it to be wide ranging across the styles he's played. It is, which for some might mean it feels a little disjointed. I don't.