Jake from TileDB, Inc. In addition to the differences pointed out in the paper, I think SciDB and TileDB are very different philosophically. SciDB is architected very much like a traditional RDMS while TileDB is much more lightweight. SciDB encourages you to use their own query language (AQL), TileDB wants to integrate and extend the high level tools you already use (Python, R, etc.) with as little overhead as possible.

Stanislav Seltser, Petacube kuwze: the following things are fundamentally different: license, software size,data model, sparsity support

SciDB --- license: Affero ,software size: 5GB ,data model: ACID ,focus on: dense ,dimensions: integer ------

TileDB license MIT ,software size <1MB , data model: eventual consistency via fragments , focus on: dense, sparse ,dimensions are integer, floats

They cover that in their paper: https://people.csail.mit.edu/stavrosp/papers/vldb2017/VLDB17...