Compare Samples (or Onion Skin feature)?

What about Cubase\ProTools killer feature in Renoise (at least in my case)?

An option to show two samples side-by-side and align them visually using markers (slice markers will do) would be a fantastic addition to this great piece of software.
For me personally, it’s the only thing i’d like to change in Renoise so far :)

Here’s a screenshot :

There are two mono samples in my example. Of course for stereo samples it will show two channels for each

I would especially dig this the utmost, for example for layering snaredrums and claps. This could then enable one to set a certain relative delay for the layers amongst eachother (delay filled with silence automatically).
That is, if also a sample start/end param is added to samples and start can be a negative sample count.