It might, depending on how you go about your routine.
When you were using the cartridge razor, do you feel like you were applying more pressure and/or making more passes?
Likewise with the Super Speed, more pressure and/or passes?
I started with a Merkur 1904 open comb, and routinely flayed my face with it. Like you, I'm also using a Merkur 34C HD, and I'm getting great shaves.
I feel like the razor burn issue is 50% equipment and 50% psychological in the sense of "OK, I'm using a more aggressive razor so I should probably be more careful."
Also, after 9 months your technique's likely improved

(I'm probably in the same boat as you - better technique = less burn)
- ice
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