I prefer Lolly. Her design and face are adorable. Also, I’ve had a grey cat since I was a kid. I just love them. She reminds me of my cats that I’ve had. I love her little stripes too. She’s just so precious. I had her on my island but I gave her to my partner since I have her amiibo card
For me it would depend a lot on the aesthetic/theme of the island. If it were me I'd go with Lolly because my island has a lot of soft colors. But they're both very cute, and Poppy would be great for an autumn-themed or natural island.
I prefer Lolly. If I’m being honest, I don’t like Poppy at all, but I’m not huge on squirrels anyway. I really liked Lolly when she was on my island. She didn’t fit my theme though, so she had to go.