I can't speak for Alps SKBM, but I can tell you about my experience with Matias Click switches compared to pine SKCM Whites.
Matias switches are supposedly bassier and deeper than the SKBM Whites they're clones of. It makes sense, as they improved the design. They also ping far less, although the older Matias Click switches were still pretty pingy. Bit of a shame for me, as my Tactile Pro doesn't ping, and I love ping.
SKCM Whites sound MUCH fuller than the Matias Clicks, and feel more refined overall. I prefer Matias, as the weighting is lighter and the stronger tactility feels snappier. I can type faster on my Tactile Pro, and I think it's down to this.
SKCM Whites win in terms of sound, but the sound of Matias switches is very nice too. They sound more clunky and rattly, but it's charming in its own way (at least to me).
There's no reason not to get Marias switches over the genuine simplified Alps, they're better in every way - especially the switch lifetime (50 million keystrokes per switch vs 10 million).
Hope this helps!