I looked up an eico lamp chart and with a quick glance
44 .25 A
47+ 1847 .15A. And both elements the same but lifetime is rated a tad higher. ??
If same price 1847 should last a little longer.
As far a being dimmer I don't think that chart had a lumen output column.
Definately have them in place of 44. Unless you want inserts to cup and plastics to warp.