933kg vs 924kg.

Maybe not the most exhilirating match preview ever - but I think one of the most important.

Wembley tonight plays host to the so-called "clash of the giants", between Saracens and Toulouse in the Heineken Cup. It's an apt description.

The two figures above are the combined weights of each forward pack (based on my estimates of who will be selected). To put it in simple terms, it's going to be brutally, earth-shakingly physical.

Sarries this season have all been about 'power'. It was power that lost us our two big semi-finals last year; it is power, hopefully, that will take us one step further this year.

Pre-season was all about power. All the players have been talking about the extra muscle mass they've put on in training, at the order of the coaching staff.

Brown, Burger and Hargreaves are all visibly (to me) larger. Our academy products, such as George, Kruis and Fraser, are all big for their positions.

Matt Stevens may look like he goes too hard on the pies - but that is in fact the instruction of the coaches, and he can certainly carry the extra bulk.

Then we have Johnston and the Vunipola brothers - simply freaks of nature.

The game plan this year has all been about power. I

n most matches, there hasn't even been a gainline battle - such is the ferocity of the Sarries tackling and carrying.

Teams have been shunted, wrecking-balled even, onto the back foot - and the passing and running lines out wide have been good enough to capitalise.

But while the Men in Black may have been all-conquering so far in the Premiership, last week was a stark reminder of the step-up required in Europe.

Even against an unglamourous Connacht team, we saw how the pressure at this level can make even the coolest heads boil. The usual precision and accuracy levels were nowhere to be seen for large parts of the game.

The clash with Toulouse, then, will be colossal in two ways.

First, this is a team with huge experience, packed with winners, who know to react in the cauldron of do-or-die rugby.

Second, they have the individual specimens and the collective weight to stand up to Sarries physically.

Yann David and Florian Fritz are two hard-running muscle balls in the centres, who ran the Zebre defence ragged last week. Luke McAllister is a behemoth in fly-half terms.

And the Toulouse pack have the weight, the gnarl and the patience to suffocate the life out of opponents, before suddenly changing gear and motoring away.

The likes of Johnston (Census, James' brother), Albacete and Picamoles are fearsome on the gain line - and Dusautoir and Nyanga are world-class in terms of work rate and scrapping for the ball.

I predict that Sarries, with Burger back in the side and in front of what should be a great atmosphere at Wembley, will come out with real venom and aggression in the collisions.

Toulouse will either be blown away, or, more likely, they will weather the early storm without too much concession - and then try to develop a tactical choke-hold on the game.

That would truly be the test of how far this Saracens side has come, and how far it could go.

But in either case - I'm sure there will be collisions forceful enough to cause rumbles in north-west London, as these giants of European rugby do battle.