For me, each is valid. Many times through a consolidation or base period, before a trigger setup occurs, I'll take the entry in the prevailing intraday trend with a stop at the other side of that base. This trade-off of entering early is that I'm assured my full shares for the position, but the trade is less certain as the trigger for the trend continuation has yet to happen.
On the other side of this is the idea of buying contraction or selling expansion (to steal a few terms from Farley that he described to me years ago). Capitulation is more of a concept trade where entry is quite critical as you won't be able to fill your full lot if you don't have either good execution technique in addition to a "feel" for where the low will be.
Entry is critical because you certainly don't want to be filled at levels where you've taken away too much of the profit potential. Nailing the absolute bottom will be difficult at best in a capitulation type setup as liquidity is mostly thin. So if this stock continues lower after just a brief reversal, your crappy entry can lead to a worse loss if getting out of the stock is difficult due to liquidity concerns. Basically in this scenario, you have mass or majority panic selling creating that contraction bar. This is where contrarion traders look for the quick reversal and "V" kind of recovery. But entering it takes sharp execution technique many times as well as that "feel" for the lows that is voodoo for many and takes many years to attain.
So, which is best? Neither. Learn your tradeoffs. Assured full position with less certainty of trend or make sure you have the trend correctly and then try to gather your full position while fighting everyone else for the available liquidity.
Hope this helps.
Chris