I'm going to be blunt 🙂
All the RMM tools I've seen are fairly lame, not brilliant, not exceptional, a lot of their customer base is using those tools because they have no other choice.
I wrote a piece on Continuum which you can find on here somewhere for feedback on that particular tool.
The thing that will make you better than any other MSP is the people you use. Have you got a gifted account manager who can bring in new work, manage the billing/accounts you have and so on. Technology, who is on your tech team? What fields will you cover.
Have you got sticky products/items to resell. VoIP, internet, backup, things where you can add value to the product the client gets in a meaningful way (Not just blindly reselling) whilst giving them another reason to consider you.
One company which seems to be a much smaller player: https://www.atera.com/
They are integrating with these guys: http://www.splashtop.com/sos
I've not seen a product or provider who I've gone "WOW, I must have it" yet though.