The top compressor is ideal for anyone with standard springs. It is unlikely I would need to remove/install any of those even though I have some tucked away. I have the lower type too, which work perfectly with forest front springs. Never bought anything off Tradera.
I thought that you had to remove the wing before using the top one. With the bottom one (probably both types) I think that you need an unwinding tool to go with it as the springs are quite long, but could be wrong though.