No, there is a significant difference.
Are there people who will vote against defunding who are also against Obamacare?
Yes, the GOP-e who sent opposition research on Ted Cruz to Chris Wallace oppose Obamacare but do not support attaching a measure to defund Obamacare to the CR.
I don’t see how they can reconcile the views.
They do so by explaining that there is no way politically to defund Obamacare. They posit that the best we can do now with a Democrat majority in the Senate is delay Obamacare until we get a Republican majority in the Senate.
I would not be surprised if that is not the endgame for Cruz and Lee, they just not are as stupid as Boehner and so don't announce their strategy in advance. To get there, the House has to hold firm, and bring the government to a shutdown. If they hold fast long enough, and if it seems that there are some red state Democrat Senators who are getting afraid of their constituents, a compromise may well be reached, delaying Obamacare for a year or two. It will be easy to sell--they delayed it for fat cats, we just want it delayed for everyone.
And, when that compromise is reached, they are not agreeing to fund Obamacare in the future. See how easy that is? If you oppose Obamacare, you don't vote to fund it. And if you oppose Obamacare, you do vote to defund it. The distinction you want to reach is that between surrendering and fighting. You suggest that those who are surrendering to Obama are not as bad as those who are on his side from the beginning. I think one that surrenders before even trying to fight might as well be on his opponent's side.