House and Senate leaders have reportedly agreed to "bypass a bicameral conference committee to merge two healthcare bills, and have opted to instead 'ping-pong' the Senate bill over to the House and back again..."
See the following articles:
Dems agree that House will take up, tweak Senate healthcare bill (The Hill)
Democrats Circle the Wagons as Health Talks Restart (The Wall Street Journal)
Democrats may bypass formal bill process on healthcare (L.A. Times)
Additionally, the Commonwealth Fund has updated its review of the provisions and impact of the House and Senate bills currently being negotiated in Congress. For a general discussion of the some of the similarities and differences between the bills, see this Miami Herald article.