Because they are different, no issues with different fabrics. Personally think coordinating solid and print might look better, but also don't have view into the specific room.

1 solid the other with a print then put mix of pillows on both

I prefer using the same tone of grey in different textures, you could tie them together adding velvet cushions on the linen blend sofa and linen blend cushions on the velvet. Playing up texture while maintaining monochrome colours can create stunning effects. Adding crystal and silver and reflective surfaces can also increase the visual interest while remaining calm and elegant.

I like all of your responses. Thank you for taking time to answer. I lean more towards solids in different textures and working the pillows to blend the look and feel. But all great ideas!