The 2247 looks to be the newer model with a lower power usage, yet the same light output, but a longer lasting lamp.

Model years tend to make minor tweaks to add efficiency to a projector. Sometimes it is very small changes, like parts change, so they give it a new model number.

In this case, it looks like a new case, different lamp, and different lens are in use. But, most specifications are very similar.

I would expect it to be okay with solid colors on a smaller screen in a lit room, or a larger screen in a dark room. Maybe under 100" would be 'small', while above 100" will start asking for the space to be darker and darker.

I would expect good results from this model.