is it all a load of Berocca?

Is it really worth paying almost £5 for a tube of Berocca tablets (£4.37 for 15 = 29p per tablet), when both Boots and Tesco have their own variants for much less?
Boots' "Re-energise" costs less (£3.49 = 17p per tablet) but also has higher RDA levels for all the vitamins and minerals so seems like good value. Meanwhile Tesco's "B-active" costs significantly less (£1.93 for 20 = 10p per tablet) and has identical RDAs to Berocca! Is it in fact exactly the same stuff?
% RDA for... Berocca Tesco "B-active" Boots "Re-Energise"
Vitamin C 793 793 833
Thiamin (Vitamin B1) 743 743 929
Ribofalvin (Vitamin B2) 850 850 938
Niacin (Vitamin B3) 252 252 278
Vitamin B6 355 355 500
Folic Acid 183 183 200
Vitamin B12 860 860 1000
Biotin 87 87 100
Panthothenic Acid 378 378 417
Calcium 12 12 13
Magnesium 32 32 33
Zinc 60 60

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