No worries and yeah definitely. By now your engine will have realised that it has to reduce boost to account for the 95, so it will take a bit of time to adapt itself to the better petrol (maybe even upto a couple of hundred miles or so) .The more you floor it and ask for maximum performance, the quicker the ecu will learn that you now have 99 in there.
Once it adapts to that then you should have the extra torque all the time, but more importantly it will also protect your engine from any possible damage caused by the 95. Any car with a turbo should always be run on 98 octane at a minimum really, The extra heat and pressure generated is enough to cause low octane fuels to ignite from the heat rather than when the spark plug fires (called knocking or detonation). If this happens when the piston is still on it's upward stroke, then extreme downward pressure can bend or even snap the connecting rod which connects the piston to the crankshaft, the engine will be damaged beyond repair and you'll have mega bills.
