Which feature of EIGRP is not supported in OSPF?

EIGRP supports unequal-cost path load balancing through its 'variance' command, which allows traffic to be distributed across multiple paths that have different metric values, provided they are within a defined multiplier of the best path's metric. OSPF, in contrast, is limited to load balancing only over paths with exactly equal costs.

Both EIGRP and OSPF support load balancing over multiple equal-cost paths; the default maximum is typically 4, but it can often be configured higher.

Both EIGRP (which incorporates bandwidth in its composite metric) and OSPF (which uses interface cost based on bandwidth or a reference bandwidth) consider interface bandwidth when determining the best path.

Both EIGRP and OSPF, when configured with multiple equal-cost paths, can perform per-packet or per-destination (per-flow) load balancing, depending on the platform and configuration, so this is not exclusive to EIGRP.