Technically it has changed it was bond paying fixed rate return it is now claimed to be for the purposes of this claims process an agreement to provide for operation of the machines taking the payments from that. Two totally different and opposing concepts.
That means the exact same thing as providing X mhash/s worth of bitcoins, simply reworded.
The financial consideration is the bitcoin payment made for the bonds (agreements).
The electronic data processing is the hashing for the block.
The portion of the outcome is what 5 mhash/s generate.
The claim process does not state the exact amount of data processing provided by the agreements to be given but the claim process is not a contract either. Nothing says the agreements are not still for the provision of 5 mhash/s of data processing. They just sum up the purpose of the agreements (known as gigamining bonds).
It doesn't mean the same thing.
The original agreement was for payment equivalent to X MH/s of mining - that's irrespective of whether than mining occurs or what the result of the mining is.
The new one attempts to make the payment dependent on the results of the actual processing (" some portion of the outcome of this processing").
Consider what happens in those two cases if he is unable to mine for a week. In the new version clearly the "outcome of this processing" is zero - and ANY portion of zero is still zero. In the original contract the payment would be equivalent to X MH/s worth of mining. That's obviously just the most extreme example - but same principle applies to any other rise or fall in his actual mining results.
It's an entirely different thing. It's not just some rewording - it's an attempt to cover his arse by pretending he offered data processing rather than a bond paying a calculated amount per week irrespective of what the outcome was of his actual operation. And you're not dumb enough not to have already realised that.