I'm having a problem opposite to How to display my calendar on the lock screen?.
I absolutely love the clock I see on the lock-screen (Xperia Arc S (LT18i), Android 2.3.4):

Very nice appearance, and displays day of week in full. I'm very used to it since my previous phone, Xperia X8.
I want this clock on my home page (as it used to be on Xperia X8).
But when I add it as a widget, I get that:

Much smaller font and no day of week. And I can't seem to find any settings for it.
Google Play tells me the clock is Digi Clock, and it confirms it's that clock that is installed on my X8. I can't install it ("already installed"), I can't remove it (system app) and I can't update it (no updates available).
So how do I make that clock appear in the same way on both the lock-screen and the home screen?