The focus of the two moves is different,
The intermultiple detonator between the doors belongs to the fixed point explosion,
Deidara's explosion is a range bombing.
The effects of different objects are naturally different.
In theory, the ultimate perfect version of the interplication explosion should be Xiao Nan's big move, Xiao Nan's big and Deidara's big who is stronger? I'm leaning towards Xiaonan, although they're all one-time skills. But then again, can the door do this? I think it's unlikely. Refer to the time when the second generation blew up six belts of soil during the Fourth World War.
In addition, Deidara's self-detonation was also limited to Deidara's strength at that time, if Deidara's strength was at the same level as between the door, then the effect of this move was also different.
The lower limit of the strength of a move depends on the technique itself, but the upper limit depends on the strength of the user.
If you face a small-scale fixed-point explosion, the multiplication effect is better, and if you kill a large area with life, it is of course a self-detonation.
Multiplying is equivalent to 7.62 bullets of ordinary rifles, and Deidara's self-detonation is equivalent to 155 shells, and the effect is naturally different in different circumstances.