Well if you really want to be a modder read the datasheets for both.
A quick glance shows that most or the parameters/specs that matter are identical. The pinout, the R-Trim resistances (which set output volts) etc. From a quick glance it seems the typical OKR diagrams should work.
And to rise above the typical hack modders I see making theses, take airflow into consideration when it comes to layout. At about ~85-90% efficiency overall that basically means that 10-15% will end up as heat, which needs to be dissipated. So don't cover the chip assembly with an insulating layer of heat shrink tubing, at the minimum, and some vents (holes) in your enclosure. People often set them above the batteries, a heat source, and right below the 510 connector, another heat source then seal them up tight in an unvented enclosure.