I don't think it would really matter, as long as you get a "daily dose" which is 2x tablets. If swallowing the second tablet is more difficult than the first you might like to take one in the morning and one in the afternoon, you just have to remember to take them twice a day. Otherwise swallow them down together.
In regards to Elevit v's Blackmore the differences in amounts is insignificant. Blackmores is cheaper, I buy in bulk, I buy the large, 3 month supply (180 capsules) just watch out for specials, I bought the last lot for $40. The price can go up to $55. Blackmores also contains iodine, elevit doesn't. Finally Blackmores is Australian, Elevit is made overseas.