Finding Comparisons on Networking players

I'm not an english native speaker so there may be some writing mistakes

I've recently started an internship in sales for a Cisco partner that sells R&S, Security and Collaboration sollutions, with focus on Collab.

Is really important to us having specific technical arguments for customers about how cisco is better than the competitors (huawei, hp, unify, etc.) on specific products.

Example: What are the competidors of Cisco 2960x?

we have:

• HP 2920-48G-PoE+

• HP 5120-48G-PoE+ EI

• and others...

And why is cisco better comparatively?

So any of you have some sources of research? It's really hard to find comparisons.

Thanks in advance