Difference between libMetric™ and GTKWave in practice?

libMetric™

Hi, I’ve mainly used GTKWave before for waveform and timing data analysis.

Recently I came across libMetric™ — it seems to have extra features like PPA, Timing Balance, Delay Insertion, and Cell Metric analysis. Looks pretty convenient, but I didn’t see a built-in waveform viewer — or did I miss something?

For anyone who’s used both tools, how do they compare in terms of efficiency and learning curve?

Thanks for any insights!