Although Webber won from an all-RBR front row in Budapest, Vettel believes that Red Bull should be even more competitive in Belgium.
"Obviously, it is not Hungary - there are lots of straight lines, so we will see how we will get on," the German confirmed, "[There is] a big part of full throttle here, lots of straight lines where you cannot do much from the driving point of view, but I think we will find the right balance.
"Looking back, last year, we were very strong in sector two [but], with all the corners in sector one and three, we lost out. This year, I think we have a better car in all kinds of conditions and also for all types of corners whereas, last year, I think, in low speed, we were probably a little bit behind. We have definitely made a step forward, so we should be strong here as well. We don't know the weather but, generally, we are positive - and carefully optimistic."