Would reading Karla's Choice spoil the Karla Trilogy for me if I read it first?

I'm new to le Carré. I've read two of his books so far, The Spy Who Came in From the Cold and Call for the Dead. I've decided to keep going in chronological order after reading the latter. I'm just digging into A Murder of Quality.

I noticed the newer Karla's Choice, written by his son, is set right after Cold, and before The Looking Glass War. At least that's the conclusion some on this subreddit seem to have come to, after searching a bit. Goodreads also lists it as sitting at "#3.1" in the Smiley series.

I don't want to spoil the Karla trilogy before I get to it, so is there anything in Karla's Choice that would spoil that for me if I tried to stick to this assumed newer chronology? I know the Smiley novels are mostly standalone outside of the trilogy, but I'm not sure where this newer novel sits.

Thanks so much!