The walrus is appealing at first, but it isn't very easy to use. I tried one out in a shop and thought I liked it. I purchased it only to find out it was hard to get it to work. It's either too much or too little. Very hard to dial in. I eventually turned it off and used my Trinity. Sometimes less is more.
The TC trinity is my oldest pedal and will never leave my board. Long washy decays with a lightly/tastefully modulated trail.
With that said, I also have an eventide space on the board. It is the shoegaze king and will never leave either. Lots of options and can be tricky to dial, but the good sounds are there. Sometimes more is more.