Chances of successful double spend RBF

[r1s2g3]

one of the conditions is that the recipient's destination and other similar parameters have not changed.

Nope, It is not true. If you are using Electrum/wallet GUI then only above is true. In Manual RBF you will be able to change the destination address and will able to do doublespend.


Read more in detail article here.

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[Pumared]

A double-spent is nearly impossible with the current level of POW on the bitcoin network, also to do a replace transaction by fee,one of the conditions is that the recipient's destination and other similar parameters have not changed.Overriding the first transaction with a second bit similar transaction with a bigger reward or fees to miners.

It makes sense, but sending a higher rate to another transaction would nullify the lower rate.