No bargain compared to single purchase?

I individually in the trunk could not decide between this set and GA9020RF, I let myself be advised by Makita phone. Since there is no free lunch, I thought to myself that there must be differences, otherwise the low price could not be explained.
While there is only one difference, which is not to be underestimated:

GA9020RF comes with Superflansch
GA9020R not of this set.
While you can buy the Superflansch this, but costs at least 25 euros upwards.
Without this flange there is negative reviews that you can read here
I allow it to quote me a strange Rating: ". In the large machine the disc sits after use so tight that they can hardly solve even brute force does not help I already trodden the third key with the hammer."
The 25 Euro overspending are therefore mandatory. By the way can also be used with the small grinder (only for information)
The Makita consultant has advised the Superflansch necessarily to buy to me.
Incl. So Superflansch one is around 213-215 euros
For 209 you get here GA9020RF in case incl. Two diamond blades.
I suppose you need (to I suppose, those are also in :)) either an expensive super disc or at least two mediocre if one should times get broken.
I at least need this, otherwise I would need no "Flex"
We expect times for the diamond wheel (s) 50 to Euro
The kit plus plus flange disc (s) we are already at 265
The GA9020RF suitcase incl. Washers + the small 9558NB costs "only" 20 euros more.
If you both desperately needs it is still a bargain for 20 euros you can buy nowadays though not much, but is still good savings.
Applies only if you really need both.
I need an angle grinder currently for paving and then maybe 1-2 a year. Clear could do a lot with the small. But goes just as well with the large (conversely, applies not). The weight and size arguments are hardly relevant in only a few uses.
So I would for 265 euros (incl. Flange and discs) to buy two devices although I only need one. So not saved Hab 20 euro but rather almost 60 euros spent too much :)

Many words / numbers, little ... but maybe my thoughts help others in their purchasing decision

I opt for the GA9020RFK3.