Chiro has a 7km distance /3.5 altitude. Mistral has 6.5 km / 3 km altitude. Chiron is 14.4 KG, Mistral is 18.5 Kg. Mistral is bulkier 92 mm diameter )Chiron some 80mm. Chiro features dual thrust propulsion.

Chiron acceleration is some 700 mters per sec or greater. Mistral has max of 880 m/s. Mistral has higher warhead weight of 3 kg (chiron 2.5 kg) which makes a lot of difference.

In a final tally, Chiron has better range and altitude at lesser weight. Mistral is bulky and weighty and has better acceleration and 1/2 kg more warhead.

Over all, Chiron should be a better buy.

Finnish army needs to replace some 2000 Russian made infra red aimed SA-14 an SA-16 missiles shortly. Finland has requested information about existing systems through EDA (European Defence Agency) from manufacturers now in 2011, possible deliveries starting in 2015. I have read speculations that possible options are:
- French Mistral 2 or newer version (infra red)
- U.S. Stinger (infra red)
- UK Starstreak (laser)
- South Korean Chiron (infra red)
- Polish Grom (infra red)
- Russian SA-18 (infra red)
- Chinese HN-5 (infra red)

My best guess is that Russians will be out, probably also Chinese. Grom and Chiron are very interesting: pricing would be such that makes big quantities (+1000-2000 missiles) possible for Finland having about 250.000 men reservists army in 2015 (today 350.000).
In mye eyes Mistral and Stinger are strongest contenders in political terms, however most likely much more expensive than Grom and Chiron. Besides, the USA has quite strict attitude towards selling MANPADS today so you never know would USA sell or let EADS Germany sell Stangers to Finland.

Other MANDPADS in Finland include: Finnish navy have since early 1990′s Mistral 2 systems (infra red aimed) and Finnish army has since 2000′s RBS-70 systems + Bolide missiles (laser guided).

It will be interesting see, will India buy Chiron in the future.