Well, by the time your first arguement is actually implemented, Cloud would be far away from that area and stabbing Samus in the back. Your ideas are original, but complete horseshit due to lack of reasoning and thinking ahead.

This is more than a simple, clear cut battle. This will be one of maticulous trial and error, and scoping out each other and their strengths and weaknesses.

Personally, I think Samus would outfire her over-powered weapons, which would limit her use to her basic weaponry. At this time, Cloud could easily take enough heat from her to get in close and lay the smack-down. A few Break Limits later, and Samus will be mere pieces of a once constructed woman.