Complex sentence: It could roll with the Focke-Wulf Fw 190 and its turn rate was almost equal to the Bf 109 and it proved difficult to fight, even at high altitudes, where the Bf 109G and the Fw 190 had previously been able to hold their own.
Split into simpler sentences: It could roll with the Focke-Wulf Fw 190 and its turn rate was almost equal to the Bf 109. But it proved difficult to fight, even at high altitude, where the Bf 109G and the Fw 190 had previously been able to hold their own.