Here are the details on that story:
"Heliotrope Bouquet"
Written by Dan Abnett, illustrated by Lee Sullivan
Doctor Who Magazine, Issues 181 and 182, both December 1991
In the 26th century, the passengers of the space yacht Heliotrope Bouquet II are traveling in the Partition Sector, beyond which can be found the territories of the Cybermen, Daleks, and Sontarans, all of which have have not been seen for centuries. Some people even believe these are creatures of legends.
The ship's course brings them near a firefight, which they at first believe are pirates or smugglers. However as they get closer. amongst the ships they spot Cybermen (Earthshock Era) infantry in zero-g thrusters battling Daleks (grey with a red leader on the second cover) using space maneuver cradles. From the description and illustrations, it seems a pretty even match.
The Heliotrope Bouquet attempted to sneak away, but the hull is punctured by a fragment of one of the exploding ships. Upon investigation, it is a Cybermen escape pod, containing two Cybermen. They manage to destroy one, but the other seizes the ship. He is Cyberleader Klayt of the Cybership K'voon, engaging the Dalek flagship Urun-hutsaiki Rak. The cybership has been lost, but his escape pod is carrying 3 fusion devices. He cannot pilot the yacht on his own, so orders the crew to bring him along side the Dalek ship. They crew managse to swing the yacht about in a tight turn, and the g-force throws the Cyberman against the bulkhead. The crew manages to kill him and slip away from the fight before the yacht is destroyed.
That's it for the story. Sadly no real details on the conflict between the Cybermen and Daleks.
Chris